Re: Why can't lseek the STDIN_FILENO?

[Tom Lane]

"=?gb18030?B?V2VuIFlp?=" <896634...@qq.com> writes:
> &nbsp;&nbsp; &nbsp;lseek(STDIN_FILENO, 0, SEEK_SET);

If you are not checking for failure return from a system call,
you are in a state of sin.

> I really don't know, why the buffer's content not be "Hello world\n"?

Probably because a tty input device is not seekable.

                        regards, tom lane